Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 1 | /* |
| 2 | * FB driver for the ILI9341 LCD display controller |
| 3 | * |
| 4 | * This display uses 9-bit SPI: Data/Command bit + 8 data bits |
| 5 | * For platforms that doesn't support 9-bit, the driver is capable |
| 6 | * of emulating this using 8-bit transfer. |
Masanari Iida | 92def78 | 2015-03-21 11:48:37 +0900 | [diff] [blame] | 7 | * This is done by transferring eight 9-bit words in 9 bytes. |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 8 | * |
| 9 | * Copyright (C) 2013 Christian Vogelgsang |
| 10 | * Based on adafruit22fb.c by Noralf Tronnes |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or |
| 15 | * (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 21 | */ |
| 22 | |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/kernel.h> |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/delay.h> |
Priit Laes | 467786c | 2015-12-20 20:36:00 +0200 | [diff] [blame] | 27 | #include <video/mipi_display.h> |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 28 | |
| 29 | #include "fbtft.h" |
| 30 | |
| 31 | #define DRVNAME "fb_ili9341" |
| 32 | #define WIDTH 240 |
| 33 | #define HEIGHT 320 |
| 34 | #define TXBUFLEN (4 * PAGE_SIZE) |
| 35 | #define DEFAULT_GAMMA "1F 1A 18 0A 0F 06 45 87 32 0A 07 02 07 05 00\n" \ |
| 36 | "00 25 27 05 10 09 3A 78 4D 05 18 0D 38 3A 1F" |
| 37 | |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 38 | static int init_display(struct fbtft_par *par) |
| 39 | { |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 40 | par->fbtftops.reset(par); |
| 41 | |
| 42 | /* startup sequence for MI0283QT-9A */ |
Priit Laes | 467786c | 2015-12-20 20:36:00 +0200 | [diff] [blame] | 43 | write_reg(par, MIPI_DCS_SOFT_RESET); |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 44 | mdelay(5); |
Priit Laes | 467786c | 2015-12-20 20:36:00 +0200 | [diff] [blame] | 45 | write_reg(par, MIPI_DCS_SET_DISPLAY_OFF); |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 46 | /* --------------------------------------------------------- */ |
| 47 | write_reg(par, 0xCF, 0x00, 0x83, 0x30); |
| 48 | write_reg(par, 0xED, 0x64, 0x03, 0x12, 0x81); |
| 49 | write_reg(par, 0xE8, 0x85, 0x01, 0x79); |
| 50 | write_reg(par, 0xCB, 0x39, 0X2C, 0x00, 0x34, 0x02); |
| 51 | write_reg(par, 0xF7, 0x20); |
| 52 | write_reg(par, 0xEA, 0x00, 0x00); |
| 53 | /* ------------power control-------------------------------- */ |
| 54 | write_reg(par, 0xC0, 0x26); |
| 55 | write_reg(par, 0xC1, 0x11); |
| 56 | /* ------------VCOM --------- */ |
| 57 | write_reg(par, 0xC5, 0x35, 0x3E); |
| 58 | write_reg(par, 0xC7, 0xBE); |
| 59 | /* ------------memory access control------------------------ */ |
Priit Laes | 467786c | 2015-12-20 20:36:00 +0200 | [diff] [blame] | 60 | write_reg(par, MIPI_DCS_SET_PIXEL_FORMAT, 0x55); /* 16bit pixel */ |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 61 | /* ------------frame rate----------------------------------- */ |
| 62 | write_reg(par, 0xB1, 0x00, 0x1B); |
| 63 | /* ------------Gamma---------------------------------------- */ |
| 64 | /* write_reg(par, 0xF2, 0x08); */ /* Gamma Function Disable */ |
Priit Laes | 467786c | 2015-12-20 20:36:00 +0200 | [diff] [blame] | 65 | write_reg(par, MIPI_DCS_SET_GAMMA_CURVE, 0x01); |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 66 | /* ------------display-------------------------------------- */ |
| 67 | write_reg(par, 0xB7, 0x07); /* entry mode set */ |
| 68 | write_reg(par, 0xB6, 0x0A, 0x82, 0x27, 0x00); |
Priit Laes | 467786c | 2015-12-20 20:36:00 +0200 | [diff] [blame] | 69 | write_reg(par, MIPI_DCS_EXIT_SLEEP_MODE); |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 70 | mdelay(100); |
Priit Laes | 467786c | 2015-12-20 20:36:00 +0200 | [diff] [blame] | 71 | write_reg(par, MIPI_DCS_SET_DISPLAY_ON); |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 72 | mdelay(20); |
| 73 | |
| 74 | return 0; |
| 75 | } |
| 76 | |
| 77 | static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye) |
| 78 | { |
Priit Laes | 467786c | 2015-12-20 20:36:00 +0200 | [diff] [blame] | 79 | write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS, |
| 80 | (xs >> 8) & 0xFF, xs & 0xFF, (xe >> 8) & 0xFF, xe & 0xFF); |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 81 | |
Priit Laes | 467786c | 2015-12-20 20:36:00 +0200 | [diff] [blame] | 82 | write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS, |
| 83 | (ys >> 8) & 0xFF, ys & 0xFF, (ye >> 8) & 0xFF, ye & 0xFF); |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 84 | |
Priit Laes | 467786c | 2015-12-20 20:36:00 +0200 | [diff] [blame] | 85 | write_reg(par, MIPI_DCS_WRITE_MEMORY_START); |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 86 | } |
| 87 | |
Priit Laes | 467786c | 2015-12-20 20:36:00 +0200 | [diff] [blame] | 88 | #define MEM_Y BIT(7) /* MY row address order */ |
| 89 | #define MEM_X BIT(6) /* MX column address order */ |
| 90 | #define MEM_V BIT(5) /* MV row / column exchange */ |
| 91 | #define MEM_L BIT(4) /* ML vertical refresh order */ |
| 92 | #define MEM_H BIT(2) /* MH horizontal refresh order */ |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 93 | #define MEM_BGR (3) /* RGB-BGR Order */ |
| 94 | static int set_var(struct fbtft_par *par) |
| 95 | { |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 96 | switch (par->info->var.rotate) { |
| 97 | case 0: |
Priit Laes | 467786c | 2015-12-20 20:36:00 +0200 | [diff] [blame] | 98 | write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, |
| 99 | MEM_X | (par->bgr << MEM_BGR)); |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 100 | break; |
| 101 | case 270: |
Priit Laes | 467786c | 2015-12-20 20:36:00 +0200 | [diff] [blame] | 102 | write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, |
| 103 | MEM_V | MEM_L | (par->bgr << MEM_BGR)); |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 104 | break; |
| 105 | case 180: |
Priit Laes | 467786c | 2015-12-20 20:36:00 +0200 | [diff] [blame] | 106 | write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, |
| 107 | MEM_Y | (par->bgr << MEM_BGR)); |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 108 | break; |
| 109 | case 90: |
Priit Laes | 467786c | 2015-12-20 20:36:00 +0200 | [diff] [blame] | 110 | write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, |
| 111 | MEM_Y | MEM_X | MEM_V | (par->bgr << MEM_BGR)); |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 112 | break; |
| 113 | } |
| 114 | |
| 115 | return 0; |
| 116 | } |
| 117 | |
| 118 | /* |
Eva Rachel Retuya | 3a334ea | 2016-02-12 15:39:26 +0800 | [diff] [blame] | 119 | * Gamma string format: |
| 120 | * Positive: Par1 Par2 [...] Par15 |
| 121 | * Negative: Par1 Par2 [...] Par15 |
| 122 | */ |
Anish Bhatt | 94c0a54 | 2015-09-03 00:53:37 -0700 | [diff] [blame] | 123 | #define CURVE(num, idx) curves[num * par->gamma.num_values + idx] |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 124 | static int set_gamma(struct fbtft_par *par, unsigned long *curves) |
| 125 | { |
| 126 | int i; |
| 127 | |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 128 | for (i = 0; i < par->gamma.num_curves; i++) |
| 129 | write_reg(par, 0xE0 + i, |
Eva Rachel Retuya | f07e89c | 2016-02-12 15:39:27 +0800 | [diff] [blame] | 130 | CURVE(i, 0), CURVE(i, 1), CURVE(i, 2), |
| 131 | CURVE(i, 3), CURVE(i, 4), CURVE(i, 5), |
| 132 | CURVE(i, 6), CURVE(i, 7), CURVE(i, 8), |
| 133 | CURVE(i, 9), CURVE(i, 10), CURVE(i, 11), |
| 134 | CURVE(i, 12), CURVE(i, 13), CURVE(i, 14)); |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 135 | |
| 136 | return 0; |
| 137 | } |
Eva Rachel Retuya | b4ac6b2 | 2016-02-12 15:39:28 +0800 | [diff] [blame] | 138 | |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 139 | #undef CURVE |
| 140 | |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 141 | static struct fbtft_display display = { |
| 142 | .regwidth = 8, |
| 143 | .width = WIDTH, |
| 144 | .height = HEIGHT, |
| 145 | .txbuflen = TXBUFLEN, |
| 146 | .gamma_num = 2, |
| 147 | .gamma_len = 15, |
| 148 | .gamma = DEFAULT_GAMMA, |
| 149 | .fbtftops = { |
| 150 | .init_display = init_display, |
| 151 | .set_addr_win = set_addr_win, |
| 152 | .set_var = set_var, |
| 153 | .set_gamma = set_gamma, |
| 154 | }, |
| 155 | }; |
Anish Bhatt | 1014c2c | 2015-09-03 00:53:36 -0700 | [diff] [blame] | 156 | |
Thomas Petazzoni | 9b78e45 | 2014-12-31 10:11:18 +0100 | [diff] [blame] | 157 | FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9341", &display); |
| 158 | |
| 159 | MODULE_ALIAS("spi:" DRVNAME); |
| 160 | MODULE_ALIAS("platform:" DRVNAME); |
| 161 | MODULE_ALIAS("spi:ili9341"); |
| 162 | MODULE_ALIAS("platform:ili9341"); |
| 163 | |
| 164 | MODULE_DESCRIPTION("FB driver for the ILI9341 LCD display controller"); |
| 165 | MODULE_AUTHOR("Christian Vogelgsang"); |
| 166 | MODULE_LICENSE("GPL"); |